O'Hare Airport
Get Coffee
Various locations: Starbucks
For domestic travelers, Starbucks is the best you're gonna do at O'Hare. There are 17 locations all over O'Hare.

I can't believe I'm typing this, but I do have one tip: If you're in Terminal 1, avoid the big Starbucks near B9. Opt for either the one near B5 or B14, which are smaller and less crowded.
Good For: A Fix
Various locations:  Starbucks